WO2018201504A1 - Data feedback method and related device - Google Patents

Abstract

The present application discloses a feedback method for uplink data and a related device. The method comprises: receiving uplink data from a terminal device; determining a first bit group of first downlink control information, and determining a first bit in the first bit group, bits of the first downlink control information constituting at least one bit group, and bits comprised in each bit group of the first downlink control information being associated with a physical resource block within a narrowband, the first bit being used to indicate whether the uplink data is correctly received, or to indicate whether the terminal device sends new uplink data; and sending the first downlink control information. With the present application feedback information of a plurality of pieces of uplink data can be carried by one piece of downlink control information, helping to resolve the problem of large feedback resource overheads and low feedback efficiency during feedback as to whether uplink data is correctly received.

Description

Data feedback method and related equipment Technical field

The present application relates to the field of wireless communications technologies, and in particular, to a data feedback method and related device.

Background technique

In wireless communication systems such as Long Term Evolution (LTE), in order to improve the reliability of data transmission, retransmission techniques such as hybrid automatic repeat request (English: Hybrid Automatic Repeat-request, abbreviation: HARQ) mechanism for data transmission. The base station can indicate the uplink to the user equipment (English: User Equipment, abbreviation: UE) by using the downlink control information (English: Downlink Control Information, DCI) in the physical downlink control channel (English: Physical Downlink Control Channel, abbreviated as PDCCH). Resource allocation of data, the UE transmits uplink data packets according to the resource allocation. For a certain HARQ process, if the uplink data packet received by the base station is correct and does not need to be retransmitted, the base station feeds back a positive response to the UE (English: Acknowledgement, abbreviation: ACK), otherwise the feedback is negative (English: Negative Acknowledgment, abbreviation: NACK) indicates retransmission, and the ACK or NACK feedback can be carried by a Physical Hybrid ARQ Indicator Channel (English: Physical Hybrid ARQ Indicator Channel, abbreviated as PHICH), so that the data can be retransmitted when the attempted transmission of the current data fails. . In addition, Machine Type Communication (English: MTC) refers to the acquisition of physical world information by deploying various devices with certain sensing, computing, execution and communication capabilities, and realizes information transmission, coordination and processing through the network. To achieve the interconnection of people and things, things and things. The maximum transmittable and receive bandwidth of the UE performing MTC is 1.4 MHz, including a narrowband, and the PDCCH and PHICH occupied by the LTE system may have a bandwidth of the entire system, and may reach a maximum of 20 MHz, when the UE's receiving bandwidth is smaller than the system bandwidth. At this time, the DCI carried by the PDCCH and the ACK or NACK carried by the PHICH cannot be received.

In order to enable the UE to receive the DCI, the physical downlink control channel (MTC Physical Downlink Control Channel, MBR) of the device type communication can be used to carry the DCI of the UE, and a new data indication of 1 bit can be included in the DCI. (English: New data indicator, abbreviation: NDI), used to indicate whether the uplink data scheduled by the DCI is newly transmitted data, or retransmit the data sent last time by the process. If the NDI bit is inverted compared with the NDI bit in the DCI sent by the base station in the current HARQ process, it indicates that the UE needs to send new uplink data; if the NDI bit does not reverse, it indicates that the UE needs to retransmit the HARQ. The last time the process sent data. Therefore, the function of the base station to correctly receive the ACK or NACK feedback for the uplink data may be indicated by the NDI bit in the DCI carried by the MPDCCH, so that the UE does not need to receive the ACK or NACK carried by the PHICH.

However, in the above feedback mode, the DCI carried by each MPDCCH can only be used for one UE, that is, one DCI can only feedback whether the uplink data of one HARQ process of one UE is correctly received. If the uplink data of multiple UEs needs to be fed back correctly, the base station needs to send multiple DCIs, resulting in more MPDCCH resources, higher resource overhead, and lower feedback efficiency.

Summary of the invention

The present application provides a data feedback method and related device, which can carry feedback information of multiple uplink data through one downlink control information, and helps solve the problem of large feedback resource overhead and low feedback efficiency for correctly receiving feedback uplink data.

In a first aspect, the application provides a method for feeding back uplink data, including:

Receiving uplink data from the terminal device; determining a first bit group of the first downlink control information, and determining a first bit in the first bit group; and transmitting the first downlink control information.

The bit of the first downlink control information may include X bit groups, that is, the bits of the first downlink control information form X bit groups, and X is a positive integer. Further, the X bit groups include a first bit group, and bits included in each of the X bit groups may be associated with a physical resource block in a narrow band in a system bandwidth, and the first bit may be used. Indicates whether the uplink data is correctly received, or indicates whether the terminal device sends new uplink data.

Optionally, the method for feeding the uplink data may be specifically applied to an entity that receives uplink data and feeds back whether the uplink data is correctly received or sent new uplink data, where the entity may be a network device, such as a base station or a terminal device. and many more. Further, the association between the bit group and the physical resource block in the narrowband may be pre-configured, for example, by using a protocol, or the network device may notify the terminal device of the association relationship, for example, The signaling is dynamically or semi-statically notified to the terminal device. Further, the first bit group may be notified by the network device to the terminal device, for example, the network device may notify the terminal device of the information indicating the first bit group dynamically or semi-statically by using signaling; or The association between the bit group and the narrowband can be pre-configured, for example, the association between the bit group and the narrowband can be agreed upon by the protocol, and the first bit group is determined according to the narrowband occupied by the uplink data, and so on. Therefore, the feedback information carrying multiple uplink data in one downlink control information can be implemented, which helps to solve the problem that the feedback uplink data is correctly received with large feedback resource overhead and low feedback efficiency.

In some possible designs, the determining, by the network device, the first bit in the first bit group may be: determining a physical resource block occupied by the uplink data in a narrow band; determining the first downlink control information The first bit of the bits included in a block that is associated with the physical resource block. That is, the network device may determine the uplink with the physical resource block occupied by the uplink data in the narrowband, according to the physical resource block occupied by the uplink data, and the relationship between the bit included in the bit group and the physical resource block in the narrowband. The bit associated with the physical resource block occupied by the data, and then the determined first bit group obtains the associated bit in the first bit group as the first bit.

In some possible designs, when determining the first bit group of the first downlink control information, the network device may be specifically: determining, according to the predefined association between the bit group and the narrowband, the physical resource block occupied by the uplink data. The narrowband associated bit group is located, and the associated bit group is used as the first bit group.

In some possible designs, the network device may further determine a cyclic redundancy check of the first downlink control information according to a narrowband index of the physical resource block occupied by the uplink data (English: Cyclic Redundancy Check, abbreviation: CRC) a scrambling code; the CRC of the first downlink control information is scrambled using the scrambling code. Further, when the first downlink control information is sent by the network device, the network device may be specifically configured to: send the first downlink control information after the scrambling.

In some possible designs, the network device may further send second downlink control information for scheduling the uplink data, where the second downlink control information may include an indication of the number of bit groups X of the first lower control information. At least one of information, information of the first bit group, and narrowband offset information. Further, the determining the first downlink control information The one-bit group may be specifically configured to: determine a first bit group of the first downlink control information according to the second downlink control information.

Optionally, the second downlink control information may include indication information of the number of bit groups X of the first downlink control information and information of the first bit group, so that the network device determines the first information of the first downlink control information. In the case of the bit group, the first bit group may be determined according to the indication information of the number X of the bit group and the information of the first bit group, that is, the information of the first bit group indicates the first downlink control information. The first group of bits in all groups of bits, so that the network device can directly determine the first group of bits.

Optionally, the second downlink control information may include indication information of the number of bit groups X of the first downlink control information and narrowband offset information. Therefore, when determining the first bit group of the first downlink control information, the network device may determine the first bit group according to the indication information of the number of bits X and the narrowband offset information.

In some possible designs, the network device may also send Radio Resource Control (RRC) signaling; send second downlink control information for scheduling the uplink data; where the RRC signaling may include The indication information of the number of bits X of the first downlink control information; the second downlink control information may include at least one of information of the first bit group and narrowband offset information. Further, the determining, by the network device, the first bit group of the first downlink control information, determining, according to the RRC signaling and/or the second downlink control information, the first bit group of the first downlink control information .

Optionally, the second downlink control information may include information of the first bit group and/or narrowband offset information. When the value of X indicated by the indication information of X included in the RRC signaling is greater than 1, it may be indicated that the number of the bit groups included in the first downlink control information is greater than 1, and the number of the bit groups is the same as the value of the X. Therefore, when determining the first bit group, the network device may determine the first bit group according to the information of the first bit group, or may determine the first bit group according to the narrowband offset information.

Optionally, when the value of X indicated by the indication information of the X information included in the RRC signaling is equal to 1, that is, the number of the bit groups included in the first downlink control information is one, the bit included in the first downlink control information Form the first bit group. In this scenario, the second downlink control information may include information of the first bit group and/or narrowband offset information, so that the first bit group is determined according to the information of the first bit group and/or the narrowband offset information; or The second downlink control information may directly include the bit included in the first downlink control information as the first bit group without including the information of the first bit group and the narrowband offset information.

In some possible designs, the network device may further determine, according to the narrowband index of the physical resource block occupied by the uplink data and the narrowband offset information, a scrambling code of the CRC of the first downlink control information; using the scrambling code The CRC of the first downlink control information is scrambled. Further, when the network device sends the first downlink control information, the network device may specifically: send the scrambled first downlink control information.

In some possible designs, the number of bits included in the first bit is the same as the number of physical resource blocks occupied by the uplink data, and when the number of physical resource blocks occupied by the uplink data is greater than 1, the first The bits included in one bit have the same value. Thereby improving the reliability of data feedback.

In a second aspect, the present application further provides a method for feeding back uplink data, including:

Transmitting uplink data; receiving first downlink control information from the network device; determining a first bit group of the first downlink control information, and determining a first bit in the first bit group; determining according to the first bit Whether the uplink data is correctly received or whether new uplink data is sent.

The bit of the first downlink control information includes X bit groups, and X is a positive integer, and the X bit groups include The first group of bits, and the bits included in each of the X groups of bits may be associated with a block of physical resources within a narrow band of the system bandwidth.

Optionally, the method for feeding the uplink data may be specifically applied to an entity that sends uplink data, for example, the entity may be a terminal device.

In some possible designs, when determining the first bit in the first bit group, the terminal device may be specifically: determining a physical resource block occupied by the uplink data in a narrow band; determining the first downlink control information The first bit of the bits included in a block that is associated with the physical resource block. That is, the terminal device may determine the uplink of the physical resource block occupied by the uplink data in the narrowband according to the physical resource block occupied by the uplink data and the relationship between the bit included in the bit group and the physical resource block in the narrowband. The bit associated with the physical resource block occupied by the data, and then the determined first bit group obtains the associated bit in the first bit group as the first bit.

In some possible designs, when determining the first bit group of the first downlink control information, the terminal device may specifically: determine, according to a predefined relationship between the bit group and the narrowband, the physical resource occupied by the uplink data. The narrowband associated bit group in which the block is located, and the associated bit group is taken as the first bit group.

In some possible designs, when the terminal device receives the first downlink control information from the network device, the terminal device may determine, according to the narrowband index of the physical resource block occupied by the uplink data, the first downlink control information. The scrambling code of the CRC is used to descramble the CRC of the first downlink control information to obtain the first downlink control information.

In some possible designs, the terminal device may further receive second downlink control information from the network device, where the second downlink control information is used to schedule the uplink data, and the second downlink control information includes the first downlink information. At least one of the indication information of the number of bits of the control group X, the information of the first bit group, and the narrowband offset information. Further, the determining, by the terminal device, the first bit group of the first downlink control information, according to the second downlink control information, determining the first bit group of the first downlink control information.

In some possible designs, the terminal device may further receive RRC signaling from the network device, and receive second downlink control information from the network device, where the RRC signaling may include the first downlink control information. The indication information of the number of bit groups X; the second downlink control information is used to schedule the uplink data, and the second downlink control information may include at least one of the information of the first bit group and the narrowband offset information. Further, the terminal device may determine, according to the RRC signaling and/or the second downlink control information, the first of the first downlink control information, when determining the first bit group of the first downlink control information. Bit group.

In some possible designs, when receiving the first downlink control information from the network device, the terminal device may be specifically: determining, according to the index of the narrowband where the physical resource block occupied by the uplink data is located, and the narrowband offset information. a scrambling code of the CRC of the first downlink control information; using the scrambling code to descramble the CRC of the first downlink control information, to obtain the first downlink control information.

In some possible designs, the number of bits included in the first bit is the same as the number of physical resource blocks occupied by the uplink data, and when the number of physical resource blocks occupied by the uplink data is greater than 1, the first The bits included in one bit have the same value. Thereby improving the reliability of data feedback.

In a third aspect, the present application further provides a network device, where the network device includes: a transceiver unit and a processing unit, and the network device implements some or all of the steps of the uplink data feedback method of the first aspect by using the foregoing unit.

In a fourth aspect, the application further provides a terminal device, where the network device includes: a transceiver unit and a processing unit, The terminal device implements some or all of the steps of the uplink data feedback method of the second aspect described above by using the foregoing unit.

In a fifth aspect, the present application further provides a computer storage medium storing a program, the program including some or all of the steps of the feedback method of the uplink data of the first aspect.

In a sixth aspect, the present application further provides a computer storage medium storing a program, the program including some or all of the steps of the feedback method of the uplink data of the second aspect.

In a seventh aspect, the present application further provides a network device, including: a transceiver and a processor, where the processor is connected to the transceiver; and the processor is configured to perform the uplink data feedback method in the foregoing first aspect. Part or all of the steps.

In an eighth aspect, the present application further provides a terminal device, including: a transceiver and a processor, where the processor is connected to the communication; and the processor is configured to perform the uplink data feedback method in the second aspect. Part or all of the steps.

In a ninth aspect, the present application further provides a feedback system for uplink data, including: a network device and a terminal device, where the network device is used to perform some or all of the steps of the uplink data feedback method of the foregoing first aspect. The terminal device is configured to perform some or all of the steps of the uplink data feedback method of the second aspect above.

In a tenth aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the above aspects.

In the technical solution claimed in the present application, the terminal device may send uplink data to the network device, and after receiving the uplink data, the network device may determine the first bit group of the first DCI and the first bit in the first bit group, And the first bit is used to indicate whether the uplink data is correctly received, or whether to send new uplink data, and after receiving the first DCI, the terminal device may determine whether to perform data according to the indication of the first bit. The retransmission can realize the feedback information of carrying multiple uplink data in one DCI, which helps to solve the problem that the feedback uplink data is correctly received with large feedback resource overhead and low feedback efficiency.

DRAWINGS

1 is a block diagram of a communication system according to an embodiment of the present invention;

2a is a schematic diagram of a first bit group and a first bit according to an embodiment of the present invention;

2b is a schematic diagram of a relationship between a bit in a bit group and a PRB in a narrow band according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of interaction of a method for feeding back uplink data according to an embodiment of the present invention; FIG.

4 is a schematic diagram of interaction of another method for feeding back uplink data according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a relationship between a bit group and a narrow band according to an embodiment of the present invention;

FIG. 5b is a schematic diagram of another relationship between a bit group and a narrow band according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of interaction of another method for feeding back uplink data according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram of interaction of another method for feeding back uplink data according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of another relationship between a bit group and a narrow band according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

11 is a schematic structural diagram of a feedback system for uplink data according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another network device according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of another terminal device according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

It should be understood that the technical solution of the present application may be specifically applied to various communication networks, for example, Global System of Mobile communication (English: Global System of Mobile communication, abbreviation: GSM), code division multiple access (English: Code Division Multiple Access, Abbreviations: CDMA), Wideband Code Division Multiple Access (WCDMA), Time Division-Synchronous Code Division Multiple Access (English: Time Division-Synchronous Code Division Multiple Access, abbreviation: TD-SCDMA), General Mobile communication system (English: Universal Mobile Telecommunication System, abbreviation: UMTS), Long Term Evolution (English: Long Term Evolution, abbreviation: LTE) network, etc. With the continuous development of communication technology, the technical solution of the present application can also be used for future networks. For example, the fifth generation mobile communication technology (English: The Fifth Generation Mobile Communication Technology, abbreviation: 5G) network, also known as the new air interface (English: New Radio, abbreviation: NR) network, or can be used for D2D (device to device ) Network, M2M (machine to machine) network and so on.

The network device involved in the present application may refer to an entity on the network side for transmitting or receiving a signal, such as a base station, or may be a transmission point (English: Transmission Point, abbreviation: TP), and a transmission and reception point (English: transmission) And receiver point, abbreviation: TRP), a relay device, or other network device with base station functions, or the like, or may be a terminal device. The communication involved in the technical solution of the present application may be between the base station and the terminal device, and may also be between the terminal device and the terminal device, such as communication in the D2D network, or the technical solution of the present application may also be applied to other technologies. In the scenario, for example, there is any scenario in which one entity sends uplink data, another entity receives uplink data, and feedbacks whether the uplink data is correctly received.

In the present application, the terminal device may also be referred to as a user equipment (English: User Equipment, abbreviation: UE), a mobile station (English: Mobile Station, abbreviation: MS), a terminal, a mobile terminal, Subscriber Unit (English: Subscriber Unit, abbreviation: SU), Subscriber Station (English: Subscriber Station, abbreviation: SS), mobile station (English: Mobile Station, abbreviation: MB), remote station (English: Remote Station, abbreviation: RS ), access point (English: Access Point, abbreviation: AP), remote terminal (English: Remote Terminal, abbreviation: RT), access terminal (English: Access Terminal, abbreviation: AT), user terminal (English: User Terminal , abbreviation: UT), user agent (English: User Agent, abbreviation: UA), terminal device (English: User Device, abbreviation: UD), etc., this application is not limited. The terminal can be a wireless terminal or a wired terminal. The wireless terminal can be a device that provides voice and/or data connectivity to the user, which can communicate with one or more core networks via a radio access network (e.g., RAN, radio access network). For example, the terminal device may be a UE performing MTC service, and the bandwidth is reduced to a low complexity (English: Bandwidth-reduced Low-complexity, BL: UE), non-BL UE or coverage enhancement (English: Coverage Enhancement, abbreviated as CE) UE and so on.

In the present application, a base station may refer to a device in an access network that communicates with a terminal over an air interface over one or more sectors, which may coordinate attribute management of the air interface. For example, the base station may be a base station such as GSM or CDMA, such as a base transceiver station (English: Base Transceiver Station, BTS), or a base station in WCDMA, such as a NodeB, or an evolved base station in LTE. For example, an eNB or an e-NodeB (evolutional Node B) may be a base station in a 5G system, such as a gNB, or a base station in a future network, and the like, which is not limited in this application.

In this application, the signaling involved in the embodiment of the present application may be high layer signaling, such as system message, or broadcast message, or Radio Resource Control (RRC) signaling, or media access control (Medium). Access Control, abbreviation: MAC) signaling. Alternatively, the signaling may be physical layer signaling, such as Downlink Control Information (DCI) signaling, and the like, which is not limited in this application.

The following is an introduction to the application scenario of the present application. This application takes a network device as a base station as an example, that is, a communication between a base station and a terminal device is taken as an example for description. Referring to FIG. 1, FIG. 1 is a structural diagram of a communication system according to an embodiment of the present invention. Specifically, as shown in FIG. 1 , the communication system includes a base station and a terminal device (the UE1 to the UE6 are shown in the figure), and the base station and the terminal device, or the terminal device and the terminal device can communicate with various communication systems. For example, the 5G system in the above wireless communication system may also be referred to as an NR system, such as an LTE system, thereby implementing information transmission.

For example, in the communication system, the UE1 to the UE6 can send uplink data to the base station, and the base station receives the uplink data sent by the UE1 to the UE6, and can feedback whether the uplink data is correctly received or whether new uplink data needs to be sent, and feedback Corresponding UE. In addition, UE4 to UE6 can also form a communication system. For example, in the communication system, the UE4 and the UE6 can send uplink data to the UE5, and the UE5 receives the uplink data sent by the UE4 and the UE6, and performs the uplink data to be correctly received or whether the new uplink data needs to be sent. Feedback, that is, corresponding feedback to UE4, UE6.

In the present application, when the terminal device performs feedback, feedback may be implemented by using downlink control information, such as DCI, and the downlink control information may be carried by the control channel. The control channel involved in the present application is mainly used to carry resource scheduling information and other control information, and may be, for example, a physical downlink control channel (English: Physical Downlink Control Channel, abbreviated as PDCCH), and an enhanced physical downlink control channel (English: Enhanced Physical Downlink). Control Channel, abbreviation: EPDCCH), New Radio Physical Downlink Control Channel (English: New Radio Physical Downlink Control Channel, abbreviation: NR-PDCCH), physical downlink control channel for machine type communication (English: MTC Physical Downlink Control Channel, abbreviation: MPDCCH) and other control channels and the like having the above functions as the network evolves. The following control information is DCI in the present application, and the control channel is an MPDCCH as an example, that is, an MPDCCH is used to carry the DCI as an example. In the present application, the channel may also be called a signal or the rest of the name, which is not limited in this application.

Optionally, the DCI used for feedback, that is, the first DCI, may include multiple bit groups, for example, including X bit groups, and each bit group may include one or more bits, so that the base station can be based on the bit pairs of the bit group. Whether the uplink data is correctly received or whether new uplink data needs to be sent for feedback. Wherein X is an integer greater than or equal to 1. further. Assuming that the bit used for feedback is the first bit, as shown in FIG. 2a, FIG. 2a is a schematic diagram of X bit groups composed of bits of the first DCI, and the first bit in the first bit group. Optionally, the first bit may include one or more bits.

For example, the first bit used for the feedback may represent an ACK or a NACK (ie, indicating whether the data is correctly received), and if the value of the first bit is 1 (or 0), it may represent an ACK, that is, the base station correctly receives the terminal device. The uplink data sent; if the value of the first bit is 0 (or 1), it can represent NACK, that is, the base station does not correctly receive the uplink data. As another example, the first bit can also be an NDI (ie, indicating whether new uplink data needs to be sent). For example, if the value of the first bit is in the DCI for the uplink data scheduling sent by the base station in the current HARQ process, that is, in the second DCI. If the value of the NDI bit is reversed, it indicates that the terminal device can send new uplink data. If no inversion occurs, the terminal device needs to resend the uplink data sent by the current HARQ process. Perform data retransmission.

The uplink data may be carried by a physical uplink shared channel (English: Physical Uplink Shared Channel, abbreviated as: PUSCH). A narrowband can include six consecutive physical resource blocks (English: Physical resource block, abbreviation: PRB). The resources occupied by the uplink data may be in the PRB resource unit, and the PRB occupied by the uplink data may be a PRB in a narrowband frequency range. Optionally, the resources occupied by the uplink data may also be in other resource units, or a narrow band may also include other numbers of PRBs, which is not limited in this application.

Further, the association between the PRBs in the narrowband and the bits in the bit group may be pre-configured. For example, the PRBs in the narrowband and the bits in the bitset may have a one-to-one correspondence. For example, as shown in FIG. 2b, FIG. 2b is a schematic diagram of a relationship between a bit in a bit group and a PRB in a narrow band, and FIG. 2b illustrates a bit in a bit group of the first DCI and a narrow band such as a PRB in a narrow band i Relationship. Optionally, the narrowband included in the frequency range of the system bandwidth may be numbered in ascending or descending order as a narrowband index. Assuming that the number of narrowbands included in the frequency range of the system bandwidth is N _NB , the narrowband index may range from 0 to N _NB -1. For example, the narrowband i may indicate that the index is a narrow band of i. Wherein, the PRB in the narrowband refers to the PRB included in the frequency range of a narrow band, and may be numbered in ascending or descending order of frequency for a narrow band including six consecutive PRBs as a PRB index in a narrow band. The value of the PRB index ranges from 0 to 5. For example, PRBj indicates that the index is the PRB of j. As shown in FIG. 2b, a bit group of the first DCI includes 6 bits b ₀ , b ₁ , b ₂ , b ₃ , b ₄ , b ₅ and 6 PRBs in the narrow band i: PRB0, PRB1, respectively. PRB2, PRB3, PRB4, PRB5 are associated. Further optionally, the bits included in different bit groups of the first DCI may be associated with PRBs in different narrowbands, that is, each bit group of the first DCI may be associated with one narrowband, and different bit groups of the first DCI are associated. The narrow band can be different.

As shown in the shaded portion of Fig. 2b, it is assumed that the PRB index of the PRB of the PUSCH in the narrowband i is 1, 2, 3, and its position within the narrowband is the second, third, fourth from the less frequent PRB. PRB. If the network device determines the PRB index 1, ₂ , ₃ , the association between the PRB of the index 1, 2, 3 and the bits b ₁ , b ₂ , b ₃ of the first bit group of the first DCI may be The bits b ₁ , b ₂ , b ₃ in the first bit group of the first DCI are determined to be the first bit. Alternatively, if the network device determines the second, third, and fourth PRBs starting from the PRB having a smaller frequency, the second, third, and fourth PRBs may be in the first bit group of the first DCI. bits b _1, b _2, b _3, relationship, a first group of bits in the first DCI bit b _1, b _2, b ₃ is determined as the first bit.

Optionally, the number of bits included in the first bit and the number of PRBs of the PUSCH carrying the uplink data may be the same. Further, when the number N of PRBs of the PUSCH carrying the uplink data is greater than 1, the first bit includes N bits, and the values of the N bits may be the same to improve the reliability of the data feedback. . As shown in FIG. 2b, when the number of PRBs of the PUSCH carrying the uplink data is 3 PRBs, that is, PRB1, PRB2, and PRB3, the first bit includes 3 bits, that is, b ₁ , b ₂ , b ₃ , and 3 The bits are all the same value. In this application, the manner of determining the PRB index and the narrowband index may also be other manners, which is not limited in this application.

The present invention discloses a method for feeding back uplink data, a network device, a terminal device, and a system, which can carry feedback information of multiple uplink data through one DCI, and help to solve the problem that the feedback uplink data is correctly received by the feedback resource. The problem of low feedback efficiency. The details are explained below.

Referring to FIG. 3, FIG. 3 is a schematic diagram of interaction of an uplink data feedback method according to an embodiment of the present invention. Specifically, as shown in FIG. 3, the uplink data feedback method in the embodiment of the present invention may include the following steps:

101. The terminal device sends uplink data to the network device.

102. The network device determines a first bit group of the first DCI, and determines a first bit in the first bit group.

The bit of the first DCI constitutes at least one bit group, for example, the bit of the first DCI includes X bit groups, X is a positive integer, and each bit group of the X bit groups includes a bit that can be A PRB in a narrowband of the system bandwidth is associated, the first bit is used to indicate whether the uplink data is correctly received, or whether the terminal device sends new uplink data. Specifically, the network device may receive the uplink data sent by the terminal device, and further determine a feedback bit in the DCI (ie, the first DCI) used to feed back whether the uplink data is correctly received or whether the terminal device needs to send new uplink data. The group (ie the first bit group) and the feedback bits (ie the first bit in the first bit group).

Optionally, the association between the bit group and the PRB in the narrowband may be pre-configured. For example, the relationship between the bit included in the bit group and the PRB in the narrowband may be as shown in FIG. 2b, and details are not described herein. Further optionally, each bit group of the first DCI may be associated with one narrow band, and the narrow band associated with different bit groups of the first DCI may be different. Therefore, the network device can determine the PRB occupied by the uplink data, that is, the location of the PRB of the uplink data sent by the bearer terminal in the narrowband, and can determine according to the association between the bit included in the bit group and the PRB in the narrowband. The bit associated with the PRB occupied by the uplink data in the bit group is further obtained by the determined first bit group to obtain the associated bit in the first bit group as the first bit.

The information about the PRB occupied by the uplink data may be notified by the network device to the terminal device. For example, the network device may send the information of the PUSCH resource, such as the PRB, occupied by the uplink data to the terminal by scheduling DCI (ie, the second DCI). device. Optionally, the first bit group used for data feedback may be notified by the network device to the terminal device, for example, the network device may notify the terminal device dynamically or semi-statically by signaling; or the first bit group is further It can be pre-defined, for example, the association between the bit group and the narrowband can be pre-defined, and the first bit group can be determined according to the narrow band occupied by the uplink data, and so on.

103. The network device sends the first DCI.

104. The terminal device determines a first bit group of the first DCI, and determines a first bit in the first bit group.

Optionally, after determining the first bit group and the first bit, the network device may further determine, by using a preset manner, a cyclic redundancy check of the first DCI by using a scrambling code (English: Cyclic Redundancy Check, abbreviation) : CRC) performs scrambling, and can transmit the scrambled first DCI to ensure that the terminal device that transmits the uplink data can receive the first DCI. The scrambled scrambling code may be determined according to the location of the narrowband where the PRB occupied by the uplink data is located, for example, according to the index of the narrowband, or determined according to the index of the narrowband and the narrowband offset information. The embodiments of the invention are not limited.

Further, the terminal device may perform descrambling on the CRC of the DCI sent by the base station by using the scrambling code determined by the preset manner to obtain the first DCI. The manner in which the terminal device determines the descrambling scrambling code may be the same as the manner in which the network device determines the scrambled scrambling code.

Further, after obtaining the first DCI, the terminal device may determine the first bit group and the first bit in the first DCI. The manner in which the terminal device determines the first bit group and the first bit may be the same as the manner in which the network device determines the first bit group and the first bit, and details are not described herein.

105. The terminal device determines, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data.

Specifically, after determining the first bit, the terminal device may determine, according to the feedback information indicated by the first bit, whether the uplink data is correctly received, or whether to send new uplink data. The first bit may be indicated by an ACK or a NACK, or may be indicated by an NDI. For details, refer to the related description above, and details are not described herein.

In the embodiment of the present invention, the terminal device may send uplink data to the network device, and after receiving the uplink data, the network device may determine the first bit group of the first DCI and the first bit in the first bit group, and then pass the The first bit is used to indicate whether the uplink data is correctly received, or whether to send new uplink data, and after receiving the first DCI, the terminal device may determine whether to perform data retransmission according to the indication of the first bit. Therefore, the feedback information carrying multiple uplink data in one DCI can be implemented, which helps to solve the problem that the feedback uplink data is correctly received, and the feedback resource is expensive and the feedback efficiency is low.

Referring to FIG. 4, FIG. 4 is a schematic diagram of interaction of another method for feeding back uplink data according to an embodiment of the present invention. Specifically, the network device is used as a base station, that is, the communication between the base station and the UE is The example is explained. As shown in FIG. 4, the method for feeding back the uplink data in the embodiment of the present invention may include the following steps:

201. The base station sends a second DCI, where the second DCI includes information about a PRB that carries uplink data of the UE, indication information of a number of bit groups X of the first DCI, information of the first bit group, and information in the narrowband offset information. At least one.

202. The UE sends uplink data to the base station by using the PRB indicated by the second DCI.

Specifically, the second DCI may be used to schedule the uplink data, where the second DCI may include a resource allocation of a PUSCH that carries the uplink data, such as PRB information, a modulation and coding manner, and the like. The PRB information may include a PRB index, and may further include a narrowband index where the PRB is located, where the PRB information may be used to indicate a specific location of the PRB that carries the uplink data. Therefore, the UE can determine the PRB that carries the uplink data according to the second DCI, and further perform uplink data transmission by using the PRB.

203. The base station determines a first bit group of the first DCI, and determines a first bit in the first bit group.

The bit of the first DCI constitutes at least one bit group, and the bit included in each bit group of the first DCI may be associated with a physical resource block in a narrow band, the bit group includes a bit and a narrow band The association relationship of the PRB can be pre-configured, and is not described here. The first bit can be used to indicate whether the uplink data is correctly received, or whether the UE sends new uplink data.

Specifically, the base station can receive the uplink data sent by the UE, and according to the position of the PRB of the PUSCH occupied by the uplink data in the narrowband (that is, which PRBs), and the bits in the bit group of the first DCI and the narrowband The PRB association determines the bit associated with the PRB occupied by the uplink data in the bit group of the first DCI. And determining, by the determined first bit group, the associated bit in the first bit group is the first bit. Optionally, the location of the PRB within the narrowband can be determined by a PRB index within the narrowband.

The X may be used to indicate that the first DCI includes the number of bit groups, and may also be used to indicate the number of narrow bands associated with all the bit groups of the first DCI. Optionally, the indication information of the X may be used to indicate the value of X, and the maximum value of X may be fixed by the protocol. For example, the maximum value of X may be 1, 2, 3, or 4. For example, the maximum value of X is 1, and the second DCI may not include the indication information of X. For another example, the maximum value of X is 4, and the value of X may be one of 1 to 4. The second DCI may include indication information of X. For example, if the indication X is 2, it may indicate that there are 2 in the first DCI. Bit groups. Further, the information of the first bit group may be used to indicate a first bit group of all groups of bits composed of bits of the first DCI; the narrowband offset information may indicate that the narrowband associated with the first bit group is lower than the first DCI (or high) Narrowband offset between narrowbands associated with a group of 6-bit bits. For example, the narrowband associated with the first bit group is narrowband 0, and the narrowband associated with the bit group consisting of the first DCI low (or high) 6-bit bit is narrowband 3, and the narrowband offset information is 3, which indicates an offset. 3 narrow bands.

Further, the base station may further determine a first bit group of all the bit groups composed of bits of the first DCI, that is, determine a position of the first bit group where the first bit is located, and further determine that the first bit is in the first DCI. The position in all the bits. Optionally, the determining, by the base station, the sequence of the bit associated with the PRB occupied by the uplink data and the sequence of the first bit group is not limited. For example, the bit associated with the PRB occupied by the uplink data may be determined first, and then the PRB associated with the uplink data is determined. The first bit group in which the bit is located; or the first bit group may be determined first, and then the bit associated with the PRB occupied by the uplink data in the first bit group may be determined; or the first bit group and the uplink data may be simultaneously determined to be occupied. The bits associated with the PRB are not limited in this application.

Optionally, the second DCI may further include indication information of the number of bit groups X of the first DCI and information of the first bit group. Therefore, when determining the first bit group of the first DCI, the base station may determine the first bit group according to the information of the first bit group. That is to say, in this manner, the information of the first bit group indicates the first bit group in all the bit groups, so that the base station can directly determine the first bit group. For example, if the bits of the first DCI form a total of 2 bit groups and 2 narrow bands are associated, the information of the first bit group may be 1 bit, which is used to indicate one of the 2 bit groups, and the indication is The bit group is the first bit group. Further, in this manner, the narrowband associated with all the bit groups of the first DCI may be a continuous narrowband in frequency or a discontinuous narrowband. As shown in FIG. 5a, if the bit group of the first DCI is associated with a discontinuous narrow band, it is assumed that all bits of the first DCI form 2 bit groups, and 2 bit groups are associated with discontinuous narrow bands, which are used to schedule UE1 and UE2, respectively. Upstream data. It is assumed that the PUSCH resource occupied by the UE1 is the PRB1, the PRB2, and the PRB3 in the narrowband i. The PUSCH resource occupied by the UE2 is the PRB0 and the PRB1 in the narrowband i+2, and the first bit in the second DCI for allocating the PUSCH resource to the UE1. The information of the group is 0, and the bit group formed by the bits b0 to b5 is the first bit group of the UE1, and the information of the first bit group in the second DCI for allocating the PUSCH resource for the UE2 is 1, indicating the bits b6 to b11. The composed bit group is the first bit group of UE2. The first DCI indicates to UE1 and UE2 whether the uplink data is correctly received, or whether to transmit new uplink data. B1, b2, b3 are the first bits of UE1, and b6, b7 are the first bits of UE2. Therefore, the base station can implement determining the first bit group according to the information of the first bit group. If the bit group of the first DCI is associated with a continuous narrowband, the method for determining the first bit group according to the information of the first bit group is similar to the method for determining a narrow band associated with the bit group of the first DCI, and is not Narration.

Optionally, the second DCI may further include indication information of the number of bit groups X of the first DCI and narrowband offset information. Therefore, when determining the first bit group of the first DCI, the base station may determine the first bit group according to the narrowband offset information. For example, assuming that the bits of the first DCI are composed of 3 groups of bits and associated with 3 narrow bands, the narrowband offset information may be 2 bits, indicating that the narrowband associated with the first bit group is lower (or higher) than the first DCI. The narrowband offset between the narrowbands associated with the group of bits consisting of 6 bits is 0, 1, and 2. In this manner, the narrowband associated with all of the bit groups of the first DCI may be a continuous narrowband in frequency. As shown in FIG. 5b, it is assumed that all bits of the first DCI form 3 bit groups, and 3 bit groups are associated with consecutive narrow bands for scheduling uplink data of UE1 and UE2, and it is assumed that the PUSCH resources occupied by UE1 are within narrowband i. PRB1, PRB2, PRB3, and PUSCH resources occupied by UE2 are PRB0 and PRB1 in narrowband i+2. Assume that the narrowband offset information indicates the narrowband associated with the first bit group and the first DCI The narrowband offset between the narrowbands associated with the group of bits of the lower 6 bits is used, and the narrowband offset information in the second DCI for allocating the PUSCH resources for the UE1 is 0, and the bit group consisting of the bits b0 to b5 is The first bit group of UE1. The narrowband offset information in the second DCI for allocating PUSCH resources for UE2 is 2, and the bit group consisting of bits b12 to b17 is the first bit group of UE2. The first DCI indicates to UE1 and UE2 whether the uplink data is correctly received, or whether to transmit new uplink data. B1, b2, b3 are the first bits of UE1, and b12, b13 are the first bits of UE2. Thereby the base station can implement determining the first bit group according to the narrowband offset information.

204. The base station sends the first DCI.

205. The UE determines a first bit group of the first DCI according to the second DCI, and determines a first bit in the first bit group.

206. The UE determines, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data.

Specifically, after determining the first bit group and the first bit, the base station may send the first DCI. Optionally, the base station may further perform scrambling on the CRC of the first DCI before sending the first DCI, for example, determining, according to the index of the narrowband where the PRB carrying the uplink data is located, and the narrowband offset information. The scrambled scrambling code can be used to scramble the CRC of the first DCI and then send the CRC to the UE.

Optionally, when the bit group consisting of the bits of the first DCI is fixed to be one, that is, when X is 1, the base station may determine the scrambling code of the CRC of the first DCI according to the narrowband index of the PRB of the PUSCH carrying the uplink data. . In this scenario, the second DCI may not include indication information of X, information of the first bit group, and narrowband offset information. Specifically, it is assumed that the payload bit of the first DCI (information bits, that is, the bits of the first DCI) is a ₀ , a ₁ , a ₂ , a ₃ , . . . , a _A-1 , and the check of the first DCI The bits (ie the bits of the CRC) are p ₀ , p ₁ , p ₂ , p ₃ , ..., p _L-1 , where A is the size of the payload and L is the number of check bits, eg L= 16. Further, the payload bit of the first DCI and the check bit may be connected to obtain bits b ₀ , b ₁ , b ₂ , b ₃ , . . . , b _B-1 , where B=A+L. Further, the CRC check bits of the first DCI in the bits b ₀ , b ₁ , b ₂ , b ₃ , . . . , b _B-1 may be scrambled to obtain bits c ₀ , c ₁ , c ₂ , c ₃ ,...,c _B-1 . Wherein, the relationship between the bits c _k and b _k can be:

c _k =b _k , when k=0,1,2,...,A-1

c _k =(b _k +x _NB,kA )mod 2, when k=A, A+1, A+2,...,A+15

Wherein, x _NB,0 , x _NB,1 , . . . , x _{NB, 15} is a scrambling code determined according to a narrowband index of a PRB of a PUSCH carrying the uplink data. For example, x _{NB, 0} , x _{NB, 1} , ..., x _{NB, 15} may be a 16-bit binary number represented by a narrowband index. For example, if the narrowband index of the PRB of the PUSCH is 15 _, the values of x _{NB, 0} , x _{NB, 1} , ..., x _{NB, 15} are 0000 0000 0000 1111.

Optionally, when the bit group of the first DCI is greater than or equal to one, that is, X is greater than or equal to 1, the base station may determine, according to the narrowband index of the PRB of the PUSCH carrying the uplink data, and the narrowband offset information. The scrambling code of the CRC of the first DCI. In this scenario, the second DCI needs to include indication information of X and narrowband offset information. Further optionally, the second DCI may also be information of the first bit group. The relationship between the bits c _k and b _k can be:

c _k =b _k , when k=0,1,2,...,A-1

c _k =(b _k +x _NB,kA -x _NBOffset,kA )mod 2, when k=A, A+1, A+2,...,A+15

_{Wherein, x NB, kA -x NBOffset,} kA is the first DCI a CRC scrambling _{code, x NB, 0, x NB} , 1, ..., x NB, 15 carries a PRB according to the uplink PUSCH data The narrowband index determined by it, such as x _{NB, 0} , x _{NB, 1} , ..., x _{NB, 15} may be a 16-bit binary number represented by a narrowband index, which is not described here. x _NBOffset,0 , x _NBOffset,1 ,...,x _NBOffset,15 may be determined according to the narrowband offset information, such as x _{NBOffset, 0} , x _{NBOffset, 1} , ..., x _{NBOffset, 15} may be The narrowband offset indicated by the narrowband offset information is represented as a 16-bit binary number, and if the narrowband offset indicated by the narrowband offset information is 3, x _{NBOffset, 0} , x _{NBOffset, 1} , ..., x _NBOffset The value of ₁₅ is 0000 0000 0000 0011.

Further, the UE may receive the first DCI sent by the base station, and determine the first bit group and the first bit, and the manner in which the UE determines the first bit group and the first bit may determine the first bit group with the base station. The same way as the first bit, it will not be described here. Optionally, when receiving the first DCI sent by the base station, the UE may perform descrambling on the CRC of the DCI sent by the base station by using the scrambling code determined by the preset manner to obtain the first DCI. The manner in which the UE determines the descrambling scrambling code may be the same as the manner in which the foregoing base station determines the scrambled scrambling code, and details are not described herein.

Further, after determining the first bit, the UE may determine, according to the feedback information indicated by the first bit, whether the uplink data is correctly received, or whether to send new uplink data. The first bit may be indicated by an ACK or a NACK, or may be indicated by an NDI. For details, refer to the related description above, and details are not described herein.

In the embodiment of the present invention, the UE may send uplink data to the base station, and after receiving the uplink data, the base station may determine the first bit group of the first DCI and the first bit in the first bit group, and then pass the first The bit is used to indicate whether the uplink data is correctly received, or whether to send new uplink data, and after receiving the first DCI, the UE may determine whether to perform data retransmission according to the indication of the first bit, thereby enabling The feedback information of multiple uplink data is carried in one DCI, thereby reducing the resource overhead of the feedback, improving the feedback efficiency, and helping to solve the problem that the feedback uplink data is correctly received with large feedback resource overhead and low feedback efficiency. In addition, when the number N of PRBs of the PUSCH is greater than 1, the reliability of the feedback is improved by making the values of the N bits used for feedback the same.

Referring to FIG. 6 , FIG. 6 is a schematic diagram of interaction of a method for feeding back uplink data according to an embodiment of the present invention. Specifically, as shown in FIG. 6 , the method for feeding back uplink data in the embodiment of the present invention may include the following steps. :

301. The base station sends RRC signaling, where the RRC signaling includes indication information of the number X of the bit groups of the first DCI.

Specifically, in the foregoing embodiment of the present invention, the base station may notify the UE of the indication information of the X by using RRC signaling. Optionally, the RRC signaling may be proprietary signaling.

302. The base station sends a second DCI, where the second DCI includes at least one of information of a PRB carrying uplink data of the UE, information of the first bit group, and narrowband offset information.

303. The UE sends uplink data to the base station by using the PRB indicated by the second DCI.

Specifically, the second DCI may be used to schedule the uplink data, for example, the second DCI may include a resource allocation of the PUSCH that carries the uplink data, such as PRB information, a modulation and coding manner, and the like, and the PRB information may be used to indicate a PRB that carries uplink data. The specific location. Therefore, the UE may determine the PRB of the PUSCH carrying the uplink data according to the second DCI, and further perform uplink data transmission by using the PRB.

304. The base station determines a first bit group of the first DCI, and determines a first bit in the first bit group.

The bit of the first DCI constitutes at least one bit group, and the bit included in each bit group of the first DCI may be associated with a physical resource block in a narrow band, the bit group includes a bit and a narrow band The association relationship of the PRB can be pre-configured, and is not described here. The first bit can be used to indicate whether the uplink data is correctly received, or whether the UE sends new uplink data.

Optionally, when the value of X indicated by the indication information of X included in the RRC signaling is greater than 1, the number of the bit groups included in the first DCI is greater than 1, and the number of the bit groups is the same as the value of the X. . Specifically, when determining the first bit group, the base station may determine the first bit group according to information of the first bit group included in the second DCI, or may determine the first according to the narrowband offset information included in the second DCI. Bit group. When determining the first bit, the base station may determine the first bit according to a position of the PRB occupied by the uplink data in a narrow band, and a relationship between a bit in the first bit group and a PRB in the narrow band. For details of the manner of determining the first bit group and the first bit, refer to the related description of the manner of determining the first bit group and the first bit in the foregoing embodiment shown in FIG. 4, and details are not described herein.

Optionally, when the indication information of the X indicated by the RRC signaling indicates that the value of X is equal to 1, that is, the number of the bit groups included in the first DCI is one, the bits included in the first DCI constitute a first bit group. In this scenario, the second DCI may include the information of the first bit group and/or the narrowband offset information, so as to determine the first bit group according to the information of the first bit group and/or the narrowband offset information, which may be specifically referred to. The description of the first bit group mode is not described here in the embodiment shown in FIG. 4; or the second DCI may not include the information of the first bit group and the narrowband offset information. Further, the manner of determining the first bit may be specifically referred to the related description of the manner of determining the first bit in the foregoing embodiment shown in FIG. 4, and details are not described herein.

305. The base station sends the first DCI.

306. The UE determines a first bit group of the first DCI according to the RRC signaling and/or the second DCI, and determines a first bit in the first bit group.

307. The UE determines, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data.

Specifically, after determining the first bit group and the first bit, the base station may send the first DCI. Optionally, the base station may further perform scrambling on the CRC of the first DCI before sending the first DCI, for example, determining, according to the index of the narrowband where the PRB carrying the uplink data is located, and the narrowband offset information. The scrambled scrambling code can be used to scramble the CRC of the first DCI and then send the CRC to the UE.

Optionally, when the value of X indicated by the indication information of the X information included in the RRC signaling is equal to 1, that is, the number of the bit groups included in the first DCI is 1, the base station may be located according to the PRB of the PUSCH carrying the uplink data. The narrowband index determines the scrambling code of the CRC of the first DCI. In this scenario, the second DCI may not include information of the first bit group and narrowband offset information. For the specific manner of determining the scrambling code, refer to the related description of the manner of determining the scrambling code in the foregoing embodiment shown in FIG. 4, and details are not described herein. Further, in this scenario, the second DCI may also include narrowband offset information, and the narrowband offset indicated by the narrowband offset information may be 0, such as x _{NBOffset, 0} , x _{NBOffset, 1} , . . . , x _NBOffset, the value of ₁₅ is 0000 0000 0000 0000.

Optionally, when the value of the X indicated by the indication information of the RRC signaling is greater than 1, that is, the number of the bit groups included in the first DCI is greater than 1, the base station may be configured according to the PRB of the PUSCH carrying the uplink data. The narrowband index and the narrowband offset information determine a scrambling code for the CRC of the first DCI. In this scenario, the second DCI needs to include narrowband offset information. Further optionally, the second DCI may further include information of the first bit group. For the specific manner of determining the scrambling code, refer to the related description of the manner of determining the scrambling code in the foregoing embodiment shown in FIG. 4, and details are not described herein.

Further, the UE may receive the first DCI sent by the base station, and determine the first bit group and the first bit, and the manner in which the UE determines the first bit group and the first bit may determine the first bit group with the base station. The same way as the first bit, it will not be described here. Optionally, when receiving the first DCI sent by the base station, the UE may perform descrambling on the CRC of the DCI sent by the base station by using the scrambling code determined by the preset manner to obtain the first DCI. Where the UE The manner of determining the descrambling scrambling code may be the same as the manner in which the base station determines the scrambled scrambling code, and details are not described herein.

Further, after determining the first bit, the UE may determine, according to the feedback information indicated by the first bit, whether the uplink data is correctly received, or whether to send new uplink data. The first bit may be indicated by an ACK or a NACK, or may be indicated by an NDI. For details, refer to the related description above, and details are not described herein.

In the embodiment of the present invention, the UE may send uplink data to the base station, and after receiving the uplink data, the base station may determine the first bit group of the first DCI and the first bit in the first bit group, and then pass the first The bit is used to indicate whether the uplink data is correctly received, or whether to send new uplink data, and after receiving the first DCI, the UE may determine whether to perform data retransmission according to the indication of the first bit, thereby enabling The feedback information of multiple uplink data is carried in one DCI, thereby reducing the resource overhead of the feedback, improving the feedback efficiency, and helping to solve the problem that the feedback uplink data is correctly received with large feedback resource overhead and low feedback efficiency. In addition, when the number N of PRBs of the PUSCH is greater than 1, the reliability of the feedback is improved by making the values of the N bits used for feedback the same.

Referring to FIG. 7 , FIG. 7 is a schematic diagram of interaction of a method for feeding back uplink data according to an embodiment of the present invention. Specifically, as shown in FIG. 7 , the method for feeding back uplink data in the embodiment of the present invention may include the following steps. :

401. The base station sends a second DCI, where the second DCI includes information about a PRB that carries uplink data of the UE.

402. The UE sends uplink data to the base station by using the PRB indicated by the second DCI.

Specifically, the second DCI may be used to schedule the uplink data, for example, the second DCI may include a resource allocation of the PUSCH that carries the uplink data, such as PRB information, a modulation and coding manner, and the like, and the PRB information may be used to indicate a PRB that carries uplink data. The specific location. Therefore, the UE may determine the PRB of the PUSCH carrying the uplink data according to the second DCI, and further perform uplink data transmission by using the PRB.

403. The base station determines, according to a predefined association between a bit group and a narrowband, a first bit group of the first DCI, and determines a first bit in the first bit group.

Optionally, the association between the bit group and the narrowband may be pre-configured, for example, the number of the bit groups in the first DCI, and the association relationship between each bit group and the narrowband index may be agreed by a protocol, and the uplink is carried. The narrowband-associated bit group in which the PRB of the PUSCH of the data is located is the first bit group.

For example, suppose that the bits of the first DCI are pre-defined to form 2 bit groups, and 2 consecutive narrow bands are associated, for example, the low (high) 6-bit bits of the first DCI constitute the first bit group, and the high (low) 6-bit bits are composed. The second bit group. Optionally, the narrowband associated with each bit group of the first DCI may be determined by: the narrowband index associated with the first bit group of the first DCI is an even number, or the narrowband associated with the first bit group Is a narrow band whose index is even; the narrow band index associated with the second bit group is odd, or the narrow band associated with the second bit group is a narrow band with an odd number of indices. If the narrowband of the PRB of the PUSCH carrying the uplink data is a narrowband with an even index, the bit group consisting of the low (high) 6-bit bits of the first DCI is the first bit group. If the narrowband of the PRB of the PUSCH carrying the uplink data is a narrowband whose index is an odd number, the bit group composed of the high (low) 6-bit bits of the first DCI is the first bit group. As shown in FIG. 8, if the narrowband of the PRB carrying the PUSCH carrying the uplink data is a narrowband with an index of 9, the bit group indicated by the shaded portion can be used as the first bit group.

For another example, assuming that the bits of the first DCI are grouped into one bit group, the narrow band associated with each bit group of the first DCI may be determined by: one bit group of the first DCI is associated with one narrow band, Then determine the first One bit group composed of bits of the DCI is the first bit group. Similarly, the bits of the first DCI may be pre-defined to form 3 or 4 or more bit groups, and the corresponding number of consecutive narrow bands are associated, which are not enumerated here.

404. The base station sends the first DCI.

405. The UE determines a first bit group of the first DCI according to a predefined association between a bit group and a narrowband, and determines a first bit in the first bit group.

406. The UE determines, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data.

Specifically, after determining the first bit group and the first bit, the base station may send the first DCI. Optionally, the base station may further perform scrambling on the CRC of the first DCI before sending the first DCI. For example, the scrambling code for scrambling may be determined according to an index of a narrowband where the PRB carrying the uplink data is located. The CRC of the first DCI may be scrambled using the scrambling code and then sent to the UE.

For example, in the embodiment of the present invention, the relationship between the bits c _k and b _k (the description of the c _k and b _k can be referred to the description of the embodiment shown in FIG. 4 ) may be:

c _k =b _k , when k=0,1,2,...,A-1

c _k =(b _k +x _NB,kA )mod 2, when k=A, A+1, A+2,...,A+15

Wherein, x _NB,0 , x _NB,1 , . . . , x _{NB, 15} is a scrambling code determined according to a narrowband index of a PRB of a PUSCH carrying the uplink data. For example, x _{NB, 0} , x _{NB, 1} , ..., x _{NB, 15} may be a 16-bit binary number represented by the value of fun (narrowband index). Among them, fun (narrowband index) represents a function of a narrowband index.

For example, by predefining the bits of the first DCI to form two bit groups and associating two consecutive narrow bands as an example, the fun can be:

In this scenario, it is assumed that the narrowband index of the PRB of the PUSCH carrying the uplink data is 9, _and the values of x _{NB, 0} , x _{NB, 1} , ..., x _{NB, 15} are 0000 0000 0000 1000.

For another example, a bit of a first DCI is defined in advance to form one bit group, and one narrow band is associated as an example, and fun (narrowband index)=narrowband index.

Further, the UE may receive the first DCI sent by the base station, and determine the first bit group and the first bit according to a predefined association between a bit group and a narrowband, where the UE determines the first bit group and the first bit The manner may be the same as the manner in which the base station determines the first bit group and the first bit, and details are not described herein. Optionally, when receiving the first DCI sent by the base station, the UE may perform descrambling on the CRC of the DCI sent by the base station by using the scrambling code determined by the preset manner to obtain the first DCI. The manner in which the UE determines the descrambling scrambling code may be the same as the manner in which the base station determines the scrambled scrambling code, and details are not described herein.

Further, after determining the first bit, the UE may determine, according to the feedback information indicated by the first bit, whether the uplink data is correctly received, or whether to send new uplink data. The first bit may be indicated by an ACK or a NACK, or may be indicated by an NDI. For details, refer to the related description above, and details are not described herein.

In the embodiment of the present invention, the UE may send uplink data to the base station, and after receiving the uplink data, the base station may determine the first bit group of the first DCI and the first bit in the first bit group, and then pass the first The bit is used to indicate whether the uplink data is correctly received, or whether to send new uplink data, after the UE receives the first DCI, The data may be retransmitted according to the indication of the first bit, so that the feedback information of carrying multiple uplink data in one DCI can be implemented, thereby reducing the resource overhead of the feedback and improving the feedback efficiency. The problem of large feedback resource overhead and low feedback efficiency for solving whether the uplink data is correctly received is solved. In addition, when the number N of PRBs of the PUSCH is greater than 1, the reliability of the feedback is improved by making the values of the N bits used for feedback the same.

Referring to FIG. 9, FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention. Specifically, as shown in FIG. 9, the network device in the embodiment of the present invention may include a transceiver unit 11 and a processing unit 12. among them,

The transceiver unit 11 is configured to receive uplink data from the terminal device.

The processing unit 12 is configured to determine a first bit group of the first downlink control information, and determine a first bit in the first bit group, where the bit of the first downlink control information includes X bit groups, X a positive integer, the X bit groups include the first bit group, and a bit included in each of the X bit groups is associated with a physical resource block in a narrow band in a system bandwidth, where the first bit is used Instructing whether the uplink data is correctly received, or indicating whether the terminal device sends new uplink data;

The transceiver unit 11 is further configured to send the first downlink control information.

Optionally, when determining the first bit in the first bit group, the processing unit 12 may be specifically configured to:

Determining a physical resource block occupied by the uplink data in the narrow band;

Determining a first bit associated with the physical resource block among the bits included in the first bit group of the first downlink control information.

Optionally, when determining the first bit group of the first downlink control information, the processing unit 12 may be specifically configured to:

And determining, according to the predefined association between the bit group and the narrowband, a bit group associated with the narrowband where the physical resource block occupied by the uplink data is located, and using the associated bit group as the first bit group.

Optionally, the processing unit 12 is further configured to determine, according to the narrowband index of the physical resource block occupied by the uplink data, a scrambling code of the CRC of the first downlink control information, and use the scrambling code to the first downlink. The CRC of the control information is scrambled;

Further, when the first downlink control information is sent by the transceiver unit 11, the transceiver unit 11 may be specifically configured to:

Sending the first downlink control information after scrambling.

Optionally, the transceiver unit 11 is further configured to send second downlink control information for scheduling the uplink data, where the second downlink control information includes indication information of the number of bit groups X of the first lower control information, At least one of the information of the first bit group and the narrowband offset information;

Further, when determining the first bit group of the first downlink control information, the processing unit 12 may be specifically configured to:

Determining, according to the second downlink control information, a first bit group of the first downlink control information.

Optionally, the transceiver unit 11 is further configured to send RRC signaling.

The transceiver unit 11 is further configured to send second downlink control information for scheduling the uplink data.

The RRC signaling may include indication information of the number of bits X of the first downlink control information; the second downlink control information may include at least one of information of the first bit group and narrowband offset information. ;

Further, when determining the first bit group of the first downlink control information, the processing unit 12 may be specifically configured to:

Determining, according to the RRC signaling and/or the second downlink control information, a first bit group of the first downlink control information.

Optionally, the processing unit 12 is further configured to determine, according to the narrowband index of the physical resource block occupied by the uplink data and the narrowband offset information, a scrambling code of the CRC of the first downlink control information, and use the scrambling code And scrambling the CRC of the first downlink control information;

Further, when the first downlink control information is sent by the transceiver unit 11, the transceiver unit 11 may be specifically configured to:

Sending the first downlink control information after scrambling.

Optionally, the first bit includes the same number of bits as the uplink data, and when the number of physical resource blocks occupied by the uplink data is greater than 1, the first bit includes The bits have the same value.

Optionally, the network device may implement some or all of the steps performed by the network device, such as the base station, in the method for feeding back uplink data in the foregoing embodiment shown in FIG. 3 to FIG. 8 by using the foregoing unit. It should be understood that the embodiments of the present invention are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present invention.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. Specifically, as shown in FIG. 10, the terminal device in the embodiment of the present invention may include a transceiver unit 21 and a processing unit 22. among them,

The transceiver unit 21 is configured to send uplink data.

The transceiver unit 21 is further configured to receive first downlink control information from the network device.

The processing unit 22 is configured to determine a first bit group of the first downlink control information, and determine a first bit in the first bit group, where the bit of the first downlink control information includes X bit groups, X is a positive integer, the X bit groups include the first bit group, and bits included in each of the X bit groups are associated with physical resource blocks in a narrow band in the system bandwidth;

The processing unit 22 is further configured to determine, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data.

Optionally, when determining the first bit in the first bit group, the processing unit 22 may be specifically configured to:

Determining a physical resource block occupied by the uplink data in the narrow band;

Determining a first bit associated with the physical resource block among the bits included in the first bit group of the first downlink control information.

Optionally, when determining the first bit group of the first downlink control information, the processing unit 22 may be specifically configured to:

And determining, according to the predefined association between the bit group and the narrowband, a bit group associated with the narrowband where the physical resource block occupied by the uplink data is located, and using the associated bit group as the first bit group.

Optionally, the processing unit 22 is further configured to determine, according to an index of a narrowband where the physical resource block occupied by the uplink data is located, a scrambling code of the CRC of the first downlink control information;

Further, when receiving the first downlink control information from the network device, the transceiver unit 21 may be specifically configured to: use the scrambling code to descramble the CRC of the first downlink control information, to obtain the first Downstream control information.

Optionally, the transceiver unit 21 is further configured to receive second downlink control information from the network device, where the second downlink control information is used to schedule the uplink data, and the second downlink control information includes the first downlink information. At least one of the indication information of the number of bits of the control group X, the information of the first bit group, and the narrowband offset information. Further, the processing unit 22, when determining the first bit group of the first downlink control information, may be specifically configured to: determine, according to the second downlink control information, a first bit group of the first downlink control information.

Optionally, the transceiver unit 21 is further configured to receive RRC signaling from the network device.

The transceiver unit 21 is further configured to receive second downlink control information from the network device, where the RRC The signaling includes the indication information of the number X of the first downlink control information, where the second downlink control information is used to schedule the uplink data, where the second downlink control information includes the information of the first bit group and the narrowband bias Move at least one of the information;

Further, when determining the first bit group of the first downlink control information, the processing unit 22 may be specifically configured to:

Determining, according to the RRC signaling and/or the second downlink control information, a first bit group of the first downlink control information.

Optionally, the processing unit 22 is further configured to determine, according to the narrowband index of the physical resource block occupied by the uplink data, and the narrowband offset information, a scrambling code of the CRC of the first downlink control information;

Further, when receiving the first downlink control information from the network device, the transceiver unit 21 may be specifically configured to:

The CRC of the first downlink control information is descrambled by using the scrambling code to obtain the first downlink control information.

Optionally, the first bit includes the same number of bits as the uplink data, and when the number of physical resource blocks occupied by the uplink data is greater than 1, the first bit includes The bits have the same value.

Optionally, the terminal device may implement some or all of the steps performed by the terminal device, that is, the UE, in the feedback method of the uplink data in the foregoing embodiment shown in FIG. 3 to FIG. It should be understood that the embodiments of the present invention are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present invention.

In the embodiment of the present invention, the terminal device may send uplink data to the network device, and after receiving the uplink data, the network device may determine the first bit group of the first DCI and the first bit in the first bit group, and then pass the The first bit is used to indicate whether the uplink data is correctly received, or whether to send new uplink data, and after receiving the first DCI, the terminal device may determine whether to perform data retransmission according to the indication of the first bit. Therefore, the feedback information carrying multiple uplink data in one DCI can be implemented, which helps to solve the problem that the feedback uplink data is correctly received, and the feedback resource is expensive and the feedback efficiency is low.

Referring to FIG. 11, FIG. 11 is a schematic structural diagram of a feedback system for uplink data according to an embodiment of the present invention. Specifically, as shown in FIG. 11, the system of the embodiment of the present invention may include: a terminal device 1 and a network device 2;

The terminal device 1 is configured to send uplink data.

The network device 2 is configured to receive the uplink data, determine a first bit group of the first downlink control information, and determine a first bit in the first bit group, and send the first downlink control information, where The bits of the first downlink control information form at least one bit group, and each bit group of the first downlink control information includes a bit associated with a physical resource block within a narrow band, the first bit is used to indicate the bit Whether the uplink data is correctly received, or whether the terminal device sends new uplink data;

The terminal device 1 is further configured to receive the first downlink control information, determine a first bit group of the first downlink control information, and determine a first bit in the first bit group; determine according to the first bit Whether the uplink data is correctly received, or whether new uplink data is sent;

Specifically, the terminal device 1 may refer to the related description of the terminal device, such as the UE, in the foregoing embodiment of FIG. 3 to FIG. 8. The network device 2 may refer to the network device in the corresponding embodiment of FIG. 3 to FIG. Related descriptions are not described here.

Referring to FIG. 12, FIG. 12 is a schematic structural diagram of another network device according to an embodiment of the present invention. Specifically, as shown in FIG. 12, the network device in the embodiment of the present invention may include a transceiver 200 and a processor 100, and the processor 100 is connected to the transceiver 200. Optionally, the network device may further include a memory 300, where the memory 300 can be The processor 100 is connected.

The transceiver 200, the memory 300, and the processor 100 may be connected to each other via a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 100 can be a central processing unit (English: Central Processing Unit, abbreviated: CPU), a network processor (English: Network Processor, abbreviated: NP) or a combination of a CPU and an NP.

The processor 100 can also further include a hardware chip. The hardware chip may be an application-specific integrated circuit (English: Application-Specific Integrated Circuit, ASIC), a programmable logic device (English: Programmable Logic Device, abbreviation: PLD) or a combination thereof. The above PLD can be a complex programmable logic device (English: Complex Programmable Logic Device, abbreviation: CPLD), Field-Programmable Gate Array (English: Field-Programmable Gate Array, abbreviation: FPGA), general array logic (English: Generic Array Logic, abbreviation: GAL) or any combination thereof.

The memory 300 may include a volatile memory (English: Volatile Memory), such as a random access memory (English: Random-Access Memory, abbreviation: RAM); the memory may also include a non-volatile memory (English: non-volatile memory) For example, flash memory (English: flash memory), hard disk (English: Hard Disk Drive, abbreviated: HDD) or solid state hard disk (English: Solid-State Drive, abbreviation: SSD); the memory 300 may also include the above types of memory The combination.

The network device may be a base station or a terminal device. Optionally, the memory 300 can be used to store program instructions, and the processor 100 can call the program instructions stored in the memory 300, and can perform one or more steps in the embodiment shown in FIG. 3 to FIG. The selected embodiment enables the network device to implement the functions in the above method. For example, the network device may implement some or all of the steps performed by the network device, such as the base station, in the feedback method of the uplink data in the foregoing embodiment shown in FIG. 3 to FIG. 8 through the foregoing components.

Specifically, the processor 100 is configured to: invoke the transceiver 200 to receive uplink data from the terminal device; determine a first bit group of the first downlink control information, and determine a first bit in the first bit group; The calling transceiver 200 transmits the first downlink control information.

The bit of the first downlink control information includes X bit groups, X is a positive integer, the X bit groups include the first bit group, and the bits and systems included in each of the X bit groups Associated with a physical resource block in a narrowband of the bandwidth, the first bit is used to indicate whether the uplink data is correctly received, or whether the terminal device sends new uplink data;

Optionally, when determining the first bit in the first bit group, the processor 100 may be specifically configured to: determine a physical resource block occupied by the uplink data in a narrowband; and determine a first downlink control information. The first bit of the bits included in a block that is associated with the physical resource block.

Optionally, when determining the first bit group of the first downlink control information, the processor 100 may be specifically configured to: determine, according to the predefined association between the bit group and the narrowband, the physical resource block occupied by the uplink data. The narrowband associated bit group is located, and the associated bit group is used as the first bit group.

Optionally, the processor 100 is further configured to: determine, according to a narrowband index of the physical resource block occupied by the uplink data, a scrambling code of the CRC of the first downlink control information; use the scrambling code to determine the first downlink The CRC of the control information is scrambled. Further, when the first downlink control information is sent by the processor 100, the processor 100 may be specifically configured to: send the transceiver 200 to send the scrambled first downlink control information.

Optionally, the processor 100 is further configured to: call the transceiver 200 to send second downlink control information for scheduling the uplink data, where the second downlink control information includes the number of bit groups of the first lower control information. At least one of the indication information, the information of the first bit group, and the narrowband offset information. Further, when determining the first bit group of the first downlink control information, the processor 100 may be specifically configured to: determine, according to the second downlink control information, a first bit group of the first downlink control information.

Optionally, the processor 100 is further configured to: invoke the transceiver 200 to send RRC signaling; the calling transceiver 200 sends second downlink control information for scheduling the uplink data, where the RRC signaling includes the first The indication information of the number of bit groups of the row control information; the second downlink control information includes at least one of the information of the first bit group and the narrowband offset information. Further, when determining the first bit group of the first downlink control information, the processor 100 may be specifically configured to: determine, according to the RRC signaling and/or the second downlink control information, the first downlink control information. One bit group.

Optionally, the processor 100 is further configured to: determine, according to the narrowband index of the physical resource block occupied by the uplink data, and the narrowband offset information, determine a scrambling code of the cyclic redundancy check CRC of the first downlink control information. And scrambling the CRC of the first downlink control information by using the scrambling code. Further, when the first downlink control information is sent by the processor 100, the processor 100 may be specifically configured to: send the transceiver 200 to send the scrambled first downlink control information.

Optionally, the first bit includes the same number of bits as the uplink data, and when the number of physical resource blocks occupied by the uplink data is greater than 1, the first bit includes The bits have the same value.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of another terminal device according to an embodiment of the present invention. Specifically, as shown in FIG. 13, the terminal device of the embodiment of the present invention may include: a transceiver 500 and a processor 400, and the processor 400 is connected to the transceiver 500. Optionally, the terminal device may further include a memory 600, and the memory 600 may be connected to the processor 400.

The transceiver 500, the memory 600, and the processor 400 may be connected to each other via a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 400 can be a CPU, NP or a combination of CPU and NP.

The processor 400 can also further include a hardware chip. The above hardware chip may be an ASIC, a PLD, or a combination thereof. The above PLD may be a CPLD, an FPGA, a GAL, or any combination thereof.

The memory 600 may include a volatile memory (English: Volatile Memory), such as RAM; the memory may also include non-volatile memory (English: non-volatile memory), such as flash memory (HD memory), HDD or The SSD; the memory 600 may also include a combination of the above types of memories.

Optionally, the memory 600 can be used to store program instructions, and the processor 400 can call the program instructions stored in the memory 600, and can perform one or more steps in the embodiment shown in FIG. 3 to FIG. The selected embodiment enables the terminal device to implement the functions in the above method. For example, the terminal device may implement some or all of the steps performed by the terminal device, that is, the UE, in the feedback method of the uplink data in the foregoing embodiments of FIG. 3 to FIG.

Specifically, the processor 400 is configured to: invoke the transceiver 500 to send uplink data; the calling transceiver 500 receives the first downlink control information from the network device; and determine the first bit group of the first downlink control information, And determining a first bit in the first bit group; determining, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data.

The bit of the first downlink control information includes X bit groups, X is a positive integer, the X bit groups include the first bit group, and the bits and systems included in each of the X bit groups A physical resource block within a narrow band in the bandwidth is associated.

Optionally, when determining the first bit in the first bit group, the processor 400 may be specifically configured to: determine a physical resource block occupied by the uplink data in a narrowband; and determine a first downlink control information. The first bit of the bits included in a block that is associated with the physical resource block.

Optionally, when determining the first bit group of the first downlink control information, the processor 400 may be specifically configured to: determine, according to the predefined association between the bit group and the narrowband, the physical resource occupied by the uplink data. The narrowband associated bit group in which the block is located, and the associated bit group is taken as the first bit group.

Optionally, the processor 400 is further configured to: determine, according to a narrowband index of the physical resource block occupied by the uplink data, a scrambling code of the CRC of the first downlink control information; the processor 400 receives the network device from the network device. The first downlink control information may be specifically used to perform: descrambling the CRC of the first downlink control information by using the scrambling code to obtain the first downlink control information.

Optionally, the processor 400 is further configured to: invoke the transceiver 500 to receive the second downlink control information from the network device, where the second downlink control information is used to schedule the uplink data, where the second downlink control information is used. At least one of the indication information of the number of bit groups of the first lower control information, the information of the first bit group, and the narrowband offset information. Further, when determining the first bit group of the first downlink control information, the processor 400 may be specifically configured to: determine, according to the second downlink control information, a first bit group of the first downlink control information.

Optionally, the processor 400 is further configured to: invoke the transceiver 500 to receive RRC signaling from the network device; the calling transceiver 500 receives second downlink control information from the network device; wherein the RRC signaling The first downlink control information is used to schedule the uplink data, where the second downlink control information includes information of the first bit group and narrowband offset information. At least one of them. Further, when determining the first bit group of the first downlink control information, the processor 400 may be specifically configured to: determine the first downlink control information according to the RRC signaling and/or the second downlink control information. The first bit group.

Optionally, the processor 400 is further configured to: determine, according to the narrowband index of the physical resource block occupied by the uplink data, and the narrowband offset information, a scrambling code of the CRC of the first downlink control information; When receiving the first downlink control information from the network device, the method may be specifically configured to: perform descrambling on the CRC of the first downlink control information by using the scrambling code to obtain the first downlink control information.

Optionally, the first bit includes the same number of bits as the uplink data, and when the number of physical resource blocks occupied by the uplink data is greater than 1, the first bit includes The bits have the same value.

In the embodiment of the present invention, the terminal device may send uplink data to the network device, and after receiving the uplink data, the network device may determine the first bit group of the first DCI and the first bit in the first bit group, and then pass the The first bit is used to indicate whether the uplink data is correctly received, or whether to send new uplink data, and after receiving the first DCI, the terminal device may determine whether to perform data retransmission according to the indication of the first bit. Therefore, the feedback information carrying multiple uplink data in one DCI can be implemented, which helps to solve the problem that the feedback uplink data is correctly received, and the feedback resource is expensive and the feedback efficiency is low.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

Claims (34)

A method for feeding back uplink data, characterized in that the method comprises: Receiving uplink data from the terminal device; Determining a first bit group of the first downlink control information, and determining a first bit in the first bit group; wherein, the bit of the first downlink control information includes X bit groups, and X is a positive integer, The X bit groups include the first bit group, and bits included in each of the X bit groups are associated with a physical resource block in a narrow band in a system bandwidth, where the first bit is used Instructing whether the uplink data is correctly received, or indicating whether the terminal device sends new uplink data; Sending the first downlink control information. The method according to claim 1, wherein the determining the first bit in the first bit group comprises: Determining a physical resource block occupied by the uplink data in a narrow band; Determining a first bit associated with the physical resource block among the bits included in the first bit group of the first downlink control information. The method according to claim 1, wherein the determining the first bit group of the first downlink control information comprises: Determining, according to a predefined association between a bit group and a narrowband, a bit group associated with a narrow band in which the physical resource block occupied by the uplink data is located, and using the associated bit group as the first bit group. The method according to any one of claims 1 to 3, further comprising: Determining a scrambling code of a cyclic redundancy check CRC of the first downlink control information according to an index of a narrowband where the physical resource block occupied by the uplink data is located; Using the scrambling code to scramble the CRC of the first downlink control information; The sending the first downlink control information includes: Sending the scrambled first downlink control information. The method according to claim 1 or 2, wherein the method further comprises: Sending, by the second downlink control information, the second downlink control information for scheduling the uplink data, where the second downlink control information includes indication information of the number of bit groups X of the first lower control information, and information of the first bit group And at least one of narrowband offset information; The determining the first bit group of the first downlink control information includes: Determining, according to the second downlink control information, a first bit group of the first downlink control information. The method according to claim 1 or 2, wherein the method further comprises: Transmitting radio resource control RRC signaling; Sending second downlink control information for scheduling the uplink data; The RRC signaling includes indication information of the number of bit groups X of the first downlink control information, where the second downlink control information includes at least information of the first bit group and narrowband offset information. One item; The determining the first bit group of the first downlink control information includes: Determining, according to the RRC signaling and/or the second downlink control information, a first bit group of the first downlink control information. The method according to claim 5 or 6, wherein the method further comprises: Determining a scrambling code of a cyclic redundancy check CRC of the first downlink control information according to an index of a narrowband where the physical resource block occupied by the uplink data is located and the narrowband offset information; Using the scrambling code to scramble the CRC of the first downlink control information; The sending the first downlink control information includes: Sending the scrambled first downlink control information. The method according to any one of claims 1 to 7, wherein the number of bits included in the first bit is the same as the number of physical resource blocks occupied by the uplink data, and when the uplink is When the number of physical resource blocks occupied by the data is greater than 1, the bits included in the first bit have the same value. A method for feeding back uplink data, characterized in that the method comprises: Send uplink data; Receiving first downlink control information from the network device; Determining a first bit group of the first downlink control information, and determining a first bit in the first bit group; wherein, the bit of the first downlink control information includes X bit groups, and X is positive An integer, the X bit groups include the first bit group, and a bit included in each of the X bit groups is associated with a physical resource block in a narrow band in a system bandwidth; Determining, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data. The method according to claim 9, wherein the determining the first bit in the first bit group comprises: Determining a physical resource block occupied by the uplink data in a narrow band; Determining a first bit associated with the physical resource block among the bits included in the first bit group of the first downlink control information. The method according to claim 9, wherein the determining the first bit group of the first downlink control information comprises: Determining, according to a predefined association between a bit group and a narrowband, a bit group associated with a narrow band in which the physical resource block occupied by the uplink data is located, and using the associated bit group as the first bit group. Method according to any one of claims 9 to 11, wherein the receiving is from a network The first downlink control information of the device includes: Determining a scrambling code of a cyclic redundancy check CRC of the first downlink control information according to an index of a narrowband where the physical resource block occupied by the uplink data is located; Decoding the CRC of the first downlink control information by using the scrambling code to obtain the first downlink control information. The method according to claim 9 or 10, wherein the method further comprises: Receiving second downlink control information from the network device, where the second downlink control information is used to schedule the uplink data, and the second downlink control information includes a bit group of the first lower control information At least one of the indication information of the number X, the information of the first bit group, and the narrowband offset information; The determining the first bit group of the first downlink control information includes: Determining, according to the second downlink control information, a first bit group of the first downlink control information. The method according to claim 9 or 10, wherein the method further comprises: Receiving radio resource control RRC signaling from the network device; Receiving, by the network device, second downlink control information, where the RRC signaling includes indication information of a bit group number X of the first downlink control information; and the second downlink control information is used for scheduling The uplink data, the second downlink control information includes at least one of information of the first bit group and narrowband offset information; The determining the first bit group of the first downlink control information includes: Determining, according to the RRC signaling and/or the second downlink control information, a first bit group of the first downlink control information. The method according to claim 13 or 14, wherein the receiving the first downlink control information from the network device comprises: Determining a scrambling code of a cyclic redundancy check CRC of the first downlink control information according to an index of a narrowband where the physical resource block occupied by the uplink data is located and the narrowband offset information; Decoding the CRC of the first downlink control information by using the scrambling code to obtain the first downlink control information. The method according to any one of claims 9 to 15, wherein the number of bits included in the first bit is the same as the number of physical resource blocks occupied by the uplink data, and when the uplink is When the number of physical resource blocks occupied by the data is greater than 1, the bits included in the first bit have the same value. A network device, where the network device includes: a transceiver unit, configured to receive uplink data from the terminal device; a processing unit, configured to determine a first bit group of the first downlink control information, and determine a first bit in the first bit group; where, the bit of the first downlink control information includes X bit groups, X is a positive integer, the X bit groups include the first bit group, and each of the X bit groups includes bits and system bandwidth Associated with a physical resource block in a narrowband, where the first bit is used to indicate whether the uplink data is correctly received, or whether the terminal device sends new uplink data; The transceiver unit is further configured to send the first downlink control information. The network device according to claim 17, wherein the processing unit is configured to: when determining the first bit in the first bit group: Determining a physical resource block occupied by the uplink data in a narrow band; Determining a first bit associated with the physical resource block among the bits included in the first bit group of the first downlink control information. The network device according to claim 17, wherein the processing unit is configured to: when determining the first bit group of the first downlink control information, Determining, according to a predefined association between a bit group and a narrowband, a bit group associated with a narrow band in which the physical resource block occupied by the uplink data is located, and using the associated bit group as the first bit group. [Correct according to Rule 91 02.08.2017]
A network device according to any one of claims 17 to 19, characterized in that The processing unit is further configured to determine, according to an index of a narrowband where the physical resource block occupied by the uplink data is located, a scrambling code of a cyclic redundancy check CRC of the first downlink control information, and use the scrambling code pair The CRC of the first downlink control information is scrambled; When the sending and receiving unit sends the first downlink control information, the transceiver unit is specifically configured to: Sending the scrambled first downlink control information. A network device according to claim 17 or 18, characterized in that The transceiver unit is further configured to send second downlink control information for scheduling the uplink data, where the second downlink control information includes indication information of a number of bit groups X of the first lower control information, At least one of the information of the first bit group and the narrowband offset information; When the processing unit determines the first bit group of the first downlink control information, the processing unit is specifically configured to: Determining, according to the second downlink control information, a first bit group of the first downlink control information. A network device according to claim 17 or 18, characterized in that The transceiver unit is further configured to send radio resource control RRC signaling; The transceiver unit is further configured to send second downlink control information for scheduling the uplink data. The RRC signaling includes indication information of the number of bit groups X of the first downlink control information, where the second downlink control information includes at least information of the first bit group and narrowband offset information. One item; When the processing unit determines the first bit group of the first downlink control information, the processing unit is specifically configured to: Determining, according to the RRC signaling and/or the second downlink control information, a first bit group of the first downlink control information. A network device according to claim 21 or 22, wherein The processing unit is further configured to determine, according to an index of a narrowband where the physical resource block occupied by the uplink data is located, and the narrowband offset information, a scrambling code of a cyclic redundancy check CRC of the first downlink control information, where And scrambling the CRC of the first downlink control information by using the scrambling code; When the sending and receiving unit sends the first downlink control information, the transceiver unit is specifically configured to: Sending the scrambled first downlink control information. The network device according to any one of claims 17 to 23, wherein the number of bits included in the first bit is the same as the number of physical resource blocks occupied by the uplink data, and when When the number of physical resource blocks occupied by the uplink data is greater than 1, the bits included in the first bit have the same value. A terminal device, the terminal device includes: a transceiver unit for transmitting uplink data; The transceiver unit is further configured to receive first downlink control information from the network device. a processing unit, configured to determine a first bit group of the first downlink control information, and determine a first bit in the first bit group; wherein, the bit of the first downlink control information includes X bits Group, X is a positive integer, the X bit groups include the first bit group, and bits included in each of the X bit groups are associated with a physical resource block within a narrow band of system bandwidth ; The processing unit is further configured to determine, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data. The terminal device according to claim 25, wherein the processing unit is configured to: when determining the first bit in the first bit group: Determining a physical resource block occupied by the uplink data in a narrow band; Determining a first bit associated with the physical resource block among the bits included in the first bit group of the first downlink control information. The terminal device according to claim 25, wherein the processing unit is configured to: when determining the first bit group of the first downlink control information, Determining, according to a predefined association between a bit group and a narrowband, a bit group associated with a narrow band in which the physical resource block occupied by the uplink data is located, and using the associated bit group as the first bit group. A terminal device according to any one of claims 25 to 27, characterized in that The processing unit is further configured to determine, according to an index of a narrowband where the physical resource block occupied by the uplink data is located, a scrambling code of a cyclic redundancy check CRC of the first downlink control information; When receiving the first downlink control information from the network device, the transceiver unit is specifically configured to: Decoding the CRC of the first downlink control information by using the scrambling code to obtain the first downlink control information. A terminal device according to claim 25 or 26, characterized in that The transceiver unit is further configured to receive second downlink control information from the network device, where the second downlink control information is used to schedule the uplink data, and the second downlink control information includes the first At least one of the indication information of the number of bits of the control group X, the information of the first bit group, and the narrowband offset information; When the determining, by the processing unit, the first bit group of the first downlink control information, the processing unit is specifically configured to: Determining, according to the second downlink control information, a first bit group of the first downlink control information. A terminal device according to claim 25 or 26, characterized in that The transceiver unit is further configured to receive radio resource control RRC signaling from the network device; The transceiver unit is further configured to receive second downlink control information from the network device, where the RRC signaling includes indication information of a bit group number X of the first downlink control information; The second downlink control information is used to schedule the uplink data, where the second downlink control information includes at least one of information of the first bit group and narrowband offset information; When the determining, by the processing unit, the first bit group of the first downlink control information, the processing unit is specifically configured to: Determining, according to the RRC signaling and/or the second downlink control information, a first bit group of the first downlink control information. A terminal device according to claim 29 or 30, characterized in that The processing unit is further configured to determine, according to an index of a narrowband where the physical resource block occupied by the uplink data is located, and the narrowband offset information, a scrambling code of a cyclic redundancy check CRC of the first downlink control information; When receiving the first downlink control information from the network device, the transceiver unit is specifically configured to: Decoding the CRC of the first downlink control information by using the scrambling code to obtain the first downlink control information. The terminal device according to any one of claims 25 to 31, wherein the number of bits included in the first bit is the same as the number of physical resource blocks occupied by the uplink data, and when When the number of physical resource blocks occupied by the uplink data is greater than 1, the bits included in the first bit have the same value. A network device, comprising: a transceiver and a processor, wherein the processor is connected to the transceiver; The processor is configured to execute: Invoking the transceiver to receive uplink data from the terminal device; Determining a first bit group of the first downlink control information, and determining a first bit in the first bit group; wherein, the bit of the first downlink control information includes X bit groups, and X is a positive integer, The X bit groups include the first bit group, and bits included in each of the X bit groups are associated with a physical resource block in a narrow band in a system bandwidth, where the first bit is used Instructing whether the uplink data is correctly received, or indicating whether the terminal device sends new uplink data; Invoking the transceiver to send the first downlink control information. A terminal device, comprising: a transceiver and a processor, wherein the processor is connected to the transceiver; wherein Invoking the transceiver to send uplink data; Invoking the transceiver to receive first downlink control information from a network device; Determining a first bit group of the first downlink control information, and determining a first bit in the first bit group; wherein, the bit of the first downlink control information includes X bit groups, and X is positive An integer, the X bit groups include the first bit group, and a bit included in each of the X bit groups is associated with a physical resource block in a narrow band in a system bandwidth; Determining, according to the first bit, whether the uplink data is correctly received, or whether to send new uplink data.

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